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Table 2 Number of different counts across adherent days by sociodemographic and health characteristics among youth 6–17 years (n = 4028); NHANES 2003–2006

From: Performance of the ActiGraph accelerometer using a national population-based sample of youth and adults

 

Sample size (n)

Mean (SE)

25th percentile

50th percentile

75th percentile

p value a

Gender:

     

<.0001

Male

2,026

1453.6 (8.0)

1184.0

1448.0

1701.0

 

Female

2,002

1308.4 (7.2)

1075.0

1277.5

1534.0

 

Age group:

     

<.0001

6 to 9

1,049

1621.5 (9.9)

1415.0

1632.0

1835.0

 

10 to 14

1,804

1362.5 (7.5)

1130.0

1342.0

1579.0

 

15 to 17

1,175

1196.1 (8.5)

992.0

1171.0

1385.0

 

Race/ethnicity:

     

<.0001

Non-Hispanic White

1,019

1351.1 (11.1)

1078.0

1334.0

1621.0

 

Non-Hispanic Black

1,352

1412.6 (9.9)

1150.0

1385.5

1647.5

 

Hispanic

1,457

1369.7 (8.6)

1129.0

1354.0

1596.0

 

Other

200

1410.1 (24.8)

1164.0

1393.0

1646.0

 

Body mass index:

     

<.0001

Under weight (<5th percentile)

114

1394.7 (32.3)

1106.0

1355.0

1656.0

 

Normal weight (5th- < 85th percentile)

2,426

1416.6 (7.3)

1152.0

1400.5

1666.0

 

Overweight (85th- < 95th percentile)

680

1346.4 (12.8)

1099.0

1318.0

1585.5

 

Obese (> = 95th percentile)

792

1303.4 (10.8)

1080.0

1279.0

1509.5

 

Missing

16

     

Moderate to vigorous leisure activity, self-reportedb:

    

<.0001

Tertile 1 (0–2.22 hours)

258

1102.8 (15.7)

928.0

1089.5

1261.0

 

Tertile 2 (>2.22-9.68 hours)

255

1190.8 (17.8)

992.0

1171.0

1342.0

 

Tertile 3 (>9.68 hours)

262

1250.8 (18.9)

1046.0

1230.5

1448.0

 

Missing

3,253

     

Number of adherent accelerometer days:

    

<.0001

3 days

337

979.8 (12.4)

815.0

968.0

1130.0

 

4 days

466

1138.6 (11.4)

957.0

1129.0

1296.0

 

5 days

702

1285.1 (10.8)

1077.0

1254.0

1475.0

 

6 days

1,085

1443.8 (9.3)

1207.0

1430.0

1660.0

 

7 days

1,438

1554.2 (8.5)

1323.0

1551.0

1775.0

 

Weekends

4,028

424.0 (3.1)

306.0

442.0

562.5

n/a

Weekdays

4,028

957.4 (4.4)

759.5

944.0

1139.0

n/a

  1. n/a = not applicable; SE = standard error.
  2. ap value for comparison of the means; uses t-test for 2 level and analysis of variance for > =3 levels.
  3. bAsked only for those 12 years and older.